Reversing valve and cooling system having same

ABSTRACT

The present invention discloses a reversing value which includes a pilot valve and a main valve. The main valve includes: a valve body with a valve chamber, wherein the valve chamber is provided with a valve seat therein, and the valve seat is provided with a plurality of valve ports thereon; a plurality of flow path ports are correspondingly communicated with the plurality of valve ports; a sliding valve core matching the valve seat. When the sliding valve core ( 60 ) slides to a second preset position, the D 2  port is communicated with the C port, and the S port is communicated with the E port. The present invention also discloses a cooling system with the reversing valve. The reversing valve can effectively solve the problem in the prior art that the pressure of high pressure fluid in a valve chamber of a reversing valve is unstable in the switching process.

CROSS-REFERENCE TO RELATED APPLICATIONS/INCORPORATION BY REFERENCE

This application is a 371 of International Patent Application No.PCT/CN2016/078690, filed Apr. 7, 2016, entitled “REVERSING VALVE ANDCOOLING SYSTEM HAVING SAME,” which claims priority to Chinese PatentApplication No. 201510250159.3, filed May 14, 2015 and Chinese PatentApplication No. 201510893338.9, filed Nov. 27, 2015. Theabove-identified applications are hereby incorporated herein byreference in their entirety.

TECHNICAL FIELD

The present invention relates to the field of valves, in particular to areversing valve and a refrigerating system with the same.

BACKGROUND

A reversing valve applied to a refrigerating system is mainly composedof a pilot valve and a main valve. In the process of control, reversingof the main valve is realized by means of the pilot valve to switch acirculation direction of a cooling medium, in such a manner, a heat pumprefrigerating system can switch between a cooling working state and aheating working state, thus achieving the intention of one machine twouses, namely cooling in summer and heating in winter.

FIG. 1 is a structure diagram of a typical reversing valve applied to arefrigerating system. As shown in FIG. 1, the reversing valve comprisesa main valve 100 and a pilot valve 200. A sliding valve core 104 of themain valve 100 is set in a valve chamber 107, and the sliding valve core104 relatively slides abutting against a valve seat 105. A connectingpipe 106 c, a connecting pipe 106 s and a connecting pipe 106 e arewelded on the valve seat 105 and communicated with the valve chamber107; a connecting pipe 106 d is welded on the valve body andcommunicated with the valve chamber 107.

The connecting pipe 106 d is communicated with a vent port of acompressor 110, the connecting pipe 106 s is communicated with a suctionport of the compressor 110, the connecting pipe 106 e is communicatedwith an indoor heat exchanger 140, and the connecting pipe 106 c iscommunicated with an outdoor heat exchanger 120. A piston component 101in the main valve 100 drives the valve core to slide relative to thevalve seat 105, in such a manner, switching between the cooling workingstate and the heating working state is realized. When the system needsto switch to the cooling working state, a connecting rod 103 drives thesliding valve core 104 to slide to the left side, the piston component101 at the left end abuts against an end cap of the left end, theconnecting pipe 106 e is communicated with the connecting pipe 106 s,and the connecting pipe 106 d is communicated with the connecting pipe106 c; at this point, a flow path of refrigerant in the system is: thecompressor 110→the connecting pipe 106 d→the connecting pipe 106 c→theoutdoor heat exchanger 120→a throttling element 130→the indoor heatexchanger 140→the connecting pipe 106 e→the connecting pipe 106 s→thecompressor 110. When the system needs to switch to the heating workingstate, the sliding valve core 104 slides to the right side, the pistoncomponent 101 at the right end abuts against the end cap of the rightend, the connecting pipe 106 c is communicated with the connecting pipe106 s, and the connecting pipe 106 d is connected with the connectingpipe 106 e; at this point, the flow path of refrigerant is: thecompressor 110→the connecting pipe 106 d→the connecting pipe 106 e>theindoor heat exchanger 140→the throttling element 130→the outdoor heatexchanger 120→the connecting pipe 106 c→the connecting pipe 106 s→thecompressor 110.

In the refrigerating system adopting the prior art, the working processof the whole system is: the compressor 110→the connecting pipe 106 d→theconnecting pipe 106 c→the outdoor heat exchanger 120→the throttlingelement 130→the indoor heat exchanger 140→the connecting pipe 106 e→theconnecting pipe 106 s→the compressor 110. The above process is a workingcycle, and the existing air conditioner will repeat the working cycle inpractical work.

In the refrigerating system adopting the prior art, a high pressuremedium at an outlet end of the compressor enters the valve chamber 107through the connecting pipe 106 d, and forms a channel through theconnecting pipe 106 e or the connecting pipe 106 e, so the valve chamber107 serves as a part of a refrigerant switching channel; in the valvechamber 107, the sliding valve core 104 abuts against the valve seat 105through an elastic flake; in the switching process of the system, thepressure in the valve chamber 107 is in an unstable state, whichinfluences the sliding valve core 104 to abut against the valve seat105, and then causes the instability of reversing. So, how to improvethe structure of the reversing valve and adjust the flow layout of therefrigerating system to optimize design is the problem to be solved bythe skilled in the art.

Moreover, it can be seen from the above working process that there isonly one connecting pipe is matched with the vent port of the compressorin the reversing valve, so the refrigerating system that the reversingvalve can adapt contains little variety, namely only the refrigeratingsystem having one indoor heat exchanger and one outdoor heat exchanger.After the refrigerating system is changed, for example, it is changed tohaving one indoor heat exchanger and two outdoor heat exchangers, thereversing valve cannot adapt.

SUMMARY

The present invention is mainly intended to provide a reversing valveand a refrigerating system with the same, for solving the problem in theprior art that the pressure of high pressure fluid in a valve chamber ofa reversing valve is unstable in the switching process or the problemthat a reversing cannot adapt to other types of refrigerating systems.

To this end, according to an aspect of the present invention, areversing valve is provided, which comprises a pilot valve and a mainvalve; the main valve comprises: a valve body with a valve chamber,wherein the valve chamber is provided with a valve seat therein, and thevalve seat is provided with a plurality of valve ports thereon; aplurality of flow path ports are correspondingly communicated with theplurality of valve ports; a sliding valve core is matched with the valveseat; and a drive component driving the sliding valve core toselectively open or close the valve ports; the plurality of valve portscomprise a first valve port, a second valve port, a third valve port, afourth valve port, and a fifth valve port; the plurality of flow pathports comprise an S port which is communicated with the first valveport, an E port is communicated with the second valve port, a C port iscommunicated with the third valve port, a D1 port is communicated withthe fourth valve port and a D2 port is communicated with the fifth valveport; when the sliding valve core slides to a first preset position, theD1 port is communicated with the E port, and the S port is communicatedwith the C port; when the sliding valve core slides to a second presetposition, the D2 port is communicated with the C port, and the S port iscommunicated with the E port.

Furthermore, when the sliding valve core is at the first presetposition, the D2 port is hermetically communicated with the valvechamber; when the sliding valve core is at the second preset position,the D1 port is hermetically communicated with the valve chamber.

Furthermore, the sliding valve core is separately provided with a firstchannel and a second channel thereon; when the sliding valve core is atthe first preset position, the D1 port and the E port are communicatedthrough the first channel, and the S port and the C port arecommunicated through the second channel; when the valve core is at thesecond preset position, the D2 port and the C port are communicatedthrough the second channel, and the S port and the E port arecommunicated through the first channel.

Furthermore, the reversing valve further comprises a spring pressingflake pressing the sliding valve core against the valve seat; the springpressing flake is provided with first elastic pressing units which aresymmetrically arranged at two sides of the length direction of thespring pressing flake; the sliding valve core is an integratedstructure, and there are first pressing slots are matched with the firstelastic pressing units at two sides of the length direction of thesliding valve core.

Furthermore, the spring pressing flake is further provided with a secondelastic pressing unit which is arranged along the width direction of thespring pressing flake; there is also a second pressing slot is matchedwith the second elastic pressing unit at the width direction of theapproximately central part of the sliding valve core.

Furthermore, the reversing valve further comprises the spring pressingflake pressing the sliding valve core against the valve seat, whereinthe sliding valve core comprises a first valve core provided with thefirst channel and a second valve core provided with the second channel;the spring pressing flake comprises a first spring pressing flake ismatched with the first valve core and a second spring pressing flake ismatched with the second valve core.

Furthermore, the valve chamber is isolated from the first channel andthe second channel hermetically.

Furthermore, the sliding valve core comprises a first valve core unitand a second valve core unit which are set at interval and movesynchronously; the first valve core unit is matched with the first valveport, the second valve port and the third valve port; the second valvecore unit is matched with the fourth valve port and the fifth valveport; when the sliding valve core is at the first preset position, thefirst valve port and the third valve port are communicated through aninternal channel of the first valve core unit, the second valve port andthe fourth valve port are communicated through the valve chamber, andthe second valve core unit blocks the fifth valve port; when the slidingvalve core is at the second preset position, the first valve port andthe second valve port are communicated through the internal channel inthe first valve core unit, the third valve port and the fifth valve portare communicated through the valve chamber, and the second valve coreunit blocks the fourth valve port.

Furthermore, the drive component comprises a connecting rod; the firstvalve core unit and the second valve core unit are installed on theconnecting rod; the connecting rod is provided with a first installinghole for installing the first valve core unit and a second installinghole for installing the second valve core unit.

Furthermore, the second valve core unit has a valve core body and aconnecting unit; the radial dimension of the connecting unit is lessthan the radial dimension of the valve core body.

Furthermore, a pressure spring is set between the connecting rod and thesecond valve core unit.

Furthermore, a surface, facing the valve seat, of the second valve coreunit has a recess.

Furthermore, the valve chamber is cylinder-shaped; the first valve port,the second valve port, the third valve port, the fourth valve port andthe fifth valve port are set at one side of the valve chamber, and arelinearly distributed in the axis direction of the valve chamber.

According to another aspect of the present invention, a refrigeratingsystem is provided, which comprises: a compressor, a first heatexchanger, a second heat exchanger, and a throttle valve the throttlevalve makes the first heat exchanger communicating with the second heatexchanger; the refrigerating system further comprises an auxiliary heatexchanger and the reversing valve; an inlet end of the compressor iscommunicated with the first valve port of the reversing valve; an outletend of the compressor is communicated with the fourth valve port and thefifth valve port of the reversing valve respectively; the first heatexchanger is communicated with the third valve port of the reversingvalve; the second heat exchanger is communicated with the second valveport of the reversing valve; the auxiliary heat exchanger is set betweenthe outlet end of the compressor and the fourth valve port or betweenthe outlet end of the compressor and the fifth valve port.

According to the reversing valve and the refrigerating system using thereversing valve disclosed in the present invention, two independentoutput pipes of the compressor are set, one of which is used as a partof cooling flow path, and the other is directly communicated with thevalve chamber, and the valve chamber does not serve as a part of thecooling flow path; in such a manner, in the switching process of therefrigerating system, the valve chamber can keep the stability ofpressure, and the reliability of reversing of the refrigerating systemis improved greatly.

By using the technical solution of the present invention, the slidingvalve core is set in the valve chamber, and the sliding valve corecomprises the first valve core unit and the second valve core unit whichare set at interval and move synchronously; the first valve core unit ismatched with the first valve port, the second valve port and the thirdvalve port; the second valve core unit is matched with the fourth valveport and the fifth valve port. When the reversing valve works, thesliding valve core has to working positions, namely the first presetposition and the second preset position. When the sliding valve core isat the first preset position, the first valve port and the third valveport are communicated through the internal channel in the first valvecore unit, the second valve port and the fourth valve port arecommunicated through the valve chamber, and the second valve core unitblocks the fifth valve port; when the sliding valve core is at thesecond preset position, the first valve port and the second valve portare communicated through the internal channel in the first valve coreunit, the third valve port and the fifth valve port are communicatedthrough the valve chamber, and the second valve core unit blocks thefourth valve port. In the technical solution of the application, it ispossible to make both the fourth valve port and the fifth valve port arecommunicated with the vent port of the compressor, so that the reversingvalve can adapt to other types of refrigerating systems, and theapplication scope is expanded.

The technical solution of the reversing valve and the refrigeratingsystem using the reversing valve provided in the present invention isadvantaged in that: by using the setting of two independent output pipesof the compressor, whether the reversing valve is at the first presetposition or the second preset position, the valve chamber keeps stableand sealed high pressure fluid therein, thus enabling the sliding valvecore to effectively press against the valve seat, avoiding a fluidinterference phenomenon, and ensuring stationarity of reversing of therefrigerating system and working reliability.

The reversing valve and the refrigerating system using the reversingvalve provided in the present invention is further advantaged in that:by using the setting of two independent output pipes of the compressor,an auxiliary heat exchanger can be serially connected on one of the twooutput pipes, so when an air conditioning system works, high-temperatureand high-pressure gas output from the outlet of the compressor goesthrough the auxiliary heat exchanger and releases heat. The heatreleased from the gas can be used for heating other substances, whichcan further save energy and reduce emission, thus achieving the effectof saving energy and reducing emission.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of the application areused for providing a deeper understanding of the present invention;schematic embodiments of the present invention and description thereofare used for illustrating the present invention and not intended to forman improper limit to the present invention. In the accompanyingdrawings:

FIG. 1 is a structure diagram of a reversing valve used in arefrigerating system according to the prior art;

FIG. 2 is a structure diagram of embodiment 1 of a reversing valve usedin a refrigerating system according to the present invention;

FIG. 3 is a partial structure diagram of a valve body and a valve seatof the reversing valve in FIG. 2;

FIG. 4a is a front view of the structure of a sliding valve core of thereversing valve in FIG. 2;

FIG. 4b is a top view of the structure of a sliding valve core of thereversing valve in FIG. 2;

FIG. 5a is a front view of the structure of a spring pressing flake ofthe reversing valve in FIG. 2;

FIG. 5b is a bottom view of the structure of a spring pressing flake ofthe reversing valve in FIG. 2;

FIG. 6 is a structure diagram of embodiment 2 of a reversing valveaccording to the present invention;

FIG. 7 is a longitudinal section structure diagram of a second valvecore unit of the reversing valve in FIG. 6;

FIG. 8 is a top view of the second valve core unit in FIG. 7;

FIG. 9 is a length direction section structure diagram of a valve bodyof the reversing valve in FIG. 6;

FIG. 10 is a side view of the valve body in FIG. 9;

FIG. 11 is a length direction section structure diagram of a valve seatof the reversing valve in FIG. 6;

FIG. 12 is a side view of the valve seat in FIG. 11;

FIG. 13 is a length direction section structure diagram of a connectingrod of the reversing valve in FIG. 6;

FIG. 14 is a side view of the connecting rod in FIG. 13;

FIG. 15 is a length direction section structure diagram of a pressurespring of the reversing valve in FIG. 6; and

FIG. 16 is a side view of the pressure spring in FIG. 15.

Signs in FIG. 2 to FIG. 5b are explained as follows:

1000 represents a reversing valve; 1100 represents a main valve; 1200represents a pilot valve; 10 represents a valve body; 11 represents anend cap; 20 represents a valve chamber; 30 represents a valve seat; 40represents a valve port; 41 represents a first valve port; 42 representsa second valve port; 43 represents a third valve port; 44 represents afourth valve port; 45 represents a fifth valve port; 50 represents aflow path port; S represents an S port; E represents an E port; Crepresents a C port; D1 represents a D1 port; D2 represents a D2 port;60 represents a sliding valve core; 61 represents a first channel; 62represents a second channel; 63 represents a first pressing slot; 64represents a second pressing slot; 70 represents a drive component; 71represents a connecting rod; 72 represents a piston; 80 represents aspring pressing flake; 81 represents an opening; 82 represents a firstelastic pressing unit; 83 represents a second elastic pressing unit; 1represents a compressor; 2 represents a throttle valve; 3 represents afirst heat exchanger; 4 represents a second heat exchanger; and 6represents an auxiliary heat exchanger.

Signs in FIG. 6 to FIG. 16 are explained as follows:

1 represents a compressor; 2 represents a throttle valve; 3 represents afirst heat exchanger; 4 represents a second heat exchanger; 6 representsan auxiliary heat exchanger; 20 represents a valve body; 30 represents avalve seat; 31 represents a third valve port; 32 represents a firstvalve port; 33 represents a second valve port; 34 represents a fifthvalve port; 35 represents a fourth valve port; 41 represents a firstvalve core unit; 42 represents a second valve core unit; 421 representsa valve core body; 422 represents a connecting unit; 51 represents a Cport; 52 represents an S port; 53 represents an E port; 54 represents aD2 port; 55 represents a D1 port; 60 represents a connecting rod; 61represents a first installing hole; 62 represents a second installinghole; and 70 represents a pressure spring.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Note that, the embodiments of the present invention and thecharacteristics in the embodiments can be combined under the conditionof no conflicts. The present invention is elaborated below withreference to the accompanying drawings and embodiment.

The accompanying drawings FIG. 2 to FIG. 5b show a structure diagram ofembodiment 1 of a reversing valve used in a refrigerating systemaccording to the present invention.

As shown in FIG. 2, the reversing valve 1000 of embodiment 1 comprises amain valve 1100 and a pilot valve 1200. A valve chamber 20 of the mainvalve 1100 is formed by respectively welding an end cap 11 at two endsof a metal-tube-shaped valve body 10. The valve chamber 20 is providedwith a drive component 70 therein, and the drive component 70 iscomposed of a connecting rod 71 and two pistons 72 fixed at two ends ofthe connecting rod 71. The two pistons 72 separate the valve chamber 20of the valve body 10 into a main chamber and left or right chambers. Avalve seat 30 is welded on the valve body 10, and a sliding valve core60 relatively slides pressing against the valve seat 30. There are aplurality of valve ports 40 set on the valve seat 30, and the pluralityof valve ports comprise a fourth valve port 44, a second valve port 42,a first valve port 41, a third valve port 43 and a fifth valve port 45in sequence. There are a plurality of ports welded on the valve seat 30as flow path ports, and the flow path ports comprise a D1 port, an Eport, an S port, a C port and a D2 port which are communicated with thefourth valve port 44, the second valve port 42, the first valve port 41,the third valve port 43 and the fifth valve port 45 respectively.

On the configuration of the refrigerating system, the D1 port and the D2port are communicated with a vent port of the compressor 1 (in thepresent embodiment, the D2 port is communicated with the vent port ofthe compressor 1 through an auxiliary heat exchanger 6), the S port iscommunicated with a suction port of the compressor 1; the E port iscommunicated with a first heat exchanger 3, and the C port iscommunicated with a second heat exchanger 4. The sliding valve core 60is separately provided with a first channel 61 and a second channel 62thereon; the sliding valve core 60 presses against the valve seat 30 toisolate and seal the first channel 61 and the second channel 62 from thevalve chamber 20.

When the system switches to a working state (a first preset position) asshown in FIG. 2, a flow path of refrigerant in the system is: a highpressure fluid medium compressed by the compressor→the D1 port→the firstchannel 61→the E port→the first heat exchanger 3→the throttle valve2→the second heat exchanger 4→the C port→the second channel 62→the Sport→the inlet port of the compressor 1; at the same time, the otherhigh pressure fluid medium compressed by the compressor→the auxiliaryheat exchanger 6→the D1 port→the valve chamber 20.

When the system needs to switch to the working state (a second presetposition), the reversing of capillary pressure of the pilot valve 1200switches the pressure difference of the left and right chambers of thevalve chamber 20, and the drive component 70 drives the sliding valvecore 60 to slide to the right side (not shown in the figures), at thispoint, the flow path of refrigerant in the system is: the high pressurefluid medium compressed by the compressor→the D2 port→the second channel62→the C port→the second heat exchanger 4→the throttle valve 2→the firstheat exchanger 3→the E port→the first channel 61→the S port→thecompressor 1; at the same time, the other high pressure fluid mediumcompressed by the compressor→the D1 port→the valve chamber 20.

It can be seen from the above path of fluid medium that whether thereversing valve is at the first preset position or the second presetposition, the valve chamber 20 has stable and sealed high pressurefluid, thus enabling the sliding valve core 60 to press against thevalve seat 30 in coordination with the pressure of the pressing flake,avoiding a fluid interference phenomenon in the reversing process, andensuring stationarity of reversing of the refrigerating system andworking reliability.

Furthermore, because two independent output pipes D1 and D2 of thecompressor are set, and the auxiliary heat exchanger 6 is seriallyconnected on one output pipe, when working, the refrigerating system canbe set at the first preset position or the second preset position(usually in a cooling environment). The high-temperature andhigh-pressure gas output from the outlet of the compressor goes throughthe auxiliary heat exchanger and releases heat. The heat released fromthe gas can be used for heating other substances, which can further saveenergy and reduce emission, thus achieving the effect of saving energyand reducing emission.

FIG. 3 is a partial structure diagram of a valve body and a valve seatof the reversing valve in FIG. 2; FIG. 4a and FIG. 4b are a front viewand a top view of the structure of a sliding valve core of the reversingvalve in FIG. 2; and FIG. 5a and FIG. 5b are a front view and a bottomview of the structure of a spring pressing flake of the reversing valvein FIG. 2.

As shown in FIG. 3, FIG. 4a , FIG. 4b , FIG. 5a and FIG. 5b , in thepresent embodiment, the five valve ports (the first valve port 41, thesecond valve port 42, the third valve port 43, the fourth valve port 44and the fifth valve port 45) on the valve seat 30 are set at one side ofthe valve chamber 20 and linearly arranged in the axis direction of thevalve chamber 20. The D1 port, the E port, the S port, the C port andthe D2 port are directly welded on the valve seat 30, and arecommunicated with the five valve ports respectively. So the five portscan be welded with the valve seat 30 and the valve body 10 once, it isconvenient for the switching of the sliding valve core 60, and theprocessing technology is convenient.

In the present embodiment, as a preferred embodiment, the sliding valvecore 60 adopts an integrated structure, as shown in FIG. 4a to FIG. 5b ;the sliding valve core 60 is provided with two bowl-shaped structures inthe axis of the length direction as the first channel 61 and the secondchannel 62. At the side contrary to the bowl-shaped structures, thereare first slots 63 at two sides in the axis of the length direction; andthere are second pressing slots 64 between the first channel 61 and thesecond channel 62 in the width direction at the approximately centralpart of the sliding valve core 60.

A spring pressing flake 80 is usually made of elastic metal, forexample, a stainless steel flake. The spring pressing flake 80 isapproximately of rectangular structure, and is set between theconnecting rod 71 of the drive component 70 and the sliding valve core60; there are two openings 81 set in parallel in the length direction ofthe spring pressing flake, and the two openings 81 correspond to thebowl-shaped structures of the sliding valve core 60, which is convenientto clamp the sliding valve core 60 with the spring pressing flake 80.

There are first elastic pressing units 82 set at two sides in the axisof the length direction of the spring pressing flake 80, and the firstelastic pressing units 82 press the first pressing slots 63 of thesliding valve core 60. There is a second elastic pressing unit 83 setbetween the two openings 81 on the spring pressing flake 80, and theelastic pressing unit 83 presses the second pressing slot 64 of thesliding valve core 60. Such a matching way can enable the sliding valvecore 60 to press against the valve seat 30 reliably.

Certainly, the ordinary skilled in the art can also make some extensionson the basis of the above embodiment; for example, on the configurationof the refrigerating system, the D1 port and the D2 port are directlycommunicated with the vent port of the compressor 1; for anotherexample, the sliding valve core adopts a separate structure, comprisinga first valve core and a second valve core which have the samestructure, and the first valve core and the second valve corerespectively press through an independent spring. The above solution canalso solve the problem to be solved by the present invention, which willnot be repeated here.

FIG. 6 to FIG. 16 show a structure diagram of a reversing valve ofembodiment 2.

As shown in FIG. 6, the reversing valve of the embodiment 2 comprisesthe valve body 20 with the valve chamber and the sliding valve core;wherein the valve chamber is provided with the valve seat 30 therein,and the valve seat 30 is provided with a plurality of valve portsthereon; the plurality of valve ports comprise the first valve port 32,the second valve port 33, the third valve port 31, the fourth valve port35, and the fifth valve port 34. The third valve port 31, the firstvalve port 32, the second valve port 33, the fifth valve port 34 and thefourth valve port 35 are arranged in sequence along the axis directionof the valve body 20.

The sliding valve core is set in the valve chamber and is matched withthe valve seat 30; the sliding valve core comprises a first valve coreunit 41 and a second valve core unit 42 which are set at interval andmove synchronously; the first valve core unit 41 is matched with thefirst valve port 32, the second valve port 33 and the third valve port31; the second valve core unit 42 is matched with the fourth valve port35 and the fifth valve port 34. Wherein, the sliding valve core has thefirst preset position and the second preset position; when the slidingvalve core is at the first preset position (not shown in the figures),the first valve port 32 and the third valve port 31 are communicatedthrough the internal channel of the first valve core unit 41, the secondvalve port 33 and the fourth valve port 35 are communicated through thevalve chamber, and the second valve core unit 42 blocks the fifth valveport 34; when the sliding valve core is at the second preset position(shown in FIG. 6), the first valve port 32 and the second valve port 33are communicated through the internal channel in the first valve coreunit 41, the third valve port 31 and the fifth valve port 34 arecommunicated through the valve chamber, and the second valve core unit42 blocks the fourth valve port 35.

By using the technical solution of the present invention, the slidingvalve core is set in the valve chamber, and the sliding valve corecomprises the first valve core unit 41 and the second valve core unit 42which are set at interval and move synchronously, and each valve coreunit is matched with the corresponding valve port on the valve seat 30.When the reversing valve works, the sliding valve core has two workingpositions. When the sliding valve core is at the first preset position,the first valve port 32 and the third valve port 31 are communicatedthrough the internal channel of the first valve core unit 41, the secondvalve port 33 and the fourth valve port 35 are communicated through thevalve chamber, and the second valve core unit 42 blocks the fifth valveport 34. When the sliding valve core is at the second preset position,the first valve port 32 and the second valve port 33 are communicatedthrough the internal channel in the first valve core unit 41, the thirdvalve port 31 and the fifth valve port 34 are communicated through thevalve chamber, and the second valve core unit 42 blocks the fourth valveport 35. In the technical solution of the present invention, it ispossible to make both the fourth valve port and the fifth valve port arecommunicated with the vent port of the compressor, so that the reversingvalve can adapt to other types of refrigerating systems, and theapplication scope is expanded.

Preferably, as shown in FIG. 9 and FIG. 10, the valve body 20 adopts ametal tube material, on which five holes are processed at the samecircumferential position by punching, lathing, drilling and othertechniques according to designed axial gap.

Preferably, as shown in FIG. 11 and FIG. 12, the valve seat 30 adopts adrawn or rolled D-shaped metal bar (or replaced with a semi-finishedproduct obtained by casting, forging or other techniques), on which fivestepped holes are processed at the same circumferential position bylathing, drilling and other techniques according to designed axial gap.The moving plane between the valve seat 30 and the sliding valve corecan adopt different processing technologies and flows according to thedifferent materials of the valve seat 30. Specifically, if the valveseat 30 adopts brass, the moving plane is broached after being weldedwith other parts; if the valve seat 30 adopts stainless steel, themoving plane is ground before being welded, namely in a part state. Byprocessing the moving plane between the valve seat 30 and the slidingvalve core, dynamic sealing between the valve seat 30 and the slidingvalve core is ensured, and then frictional resistance between the valveseat 30 and the sliding valve core is reduced.

Preferably, as shown in FIG. 7 and FIG. 8, the sliding valve core ismade of high polymer materials like nylon or PPS, and adopts thetechniques like injection molding or processing by a bar turningmachine. The moving plane between the sliding valve core and the valveseat 30 needs to be processed by cutting, so as to ensure its flatnessand surface roughness, ensure the dynamic sealing, and reduce thefrictional resistance between the valve seat 30 and the sliding valvecore.

As shown in FIG. 6, FIG. 9 and FIG. 10, in the present embodiment, thethird valve port 31, the first valve port 32, the second valve port 33,the fifth valve port 34 and the fourth valve port 35 are set at one sideof the valve chamber and linearly arranged in the axis direction of thevalve chamber. The above setting enables the sliding valve core torealize the switching between the first preset position and the secondpreset position by only moving along the axis direction of the valvechamber. The above structure is simple in structure, space-saving, andeasy to be realized.

As shown in FIG. 6, in the present embodiment, the reversing valvefurther comprises a drive component for driving the sliding valve coreto move. The above setting enables the sliding valve core to switchbetween the first preset position and the second preset position.

As shown in FIG. 6, FIG. 13 and FIG. 14, in the present embodiment, thedrive component comprises the connecting rod 60, on which the firstvalve core unit 41 and the second valve core unit 42 are installed. Theabove structure makes the drive component drive the connecting rod 60 tomove in the axis direction of the valve chamber, so that the first valvecore unit 41 and the second valve core unit 42 can move in the axisdirection of the valve chamber. Preferably, the connecting rod 60 isprovided with a first installing hole 61 for installing the first valvecore unit 41 and a second installing hole 62 for installing the secondvalve core unit 42 thereon, and the first valve core unit 41 and thesecond valve core unit 42 are freely embedded, through its ownstructural step, in the first installing hole and the second installinghole of the connecting rod 60. The above installation mode makes acertain matching gap exist between the first valve core unit and thesecond valve core unit and the connecting rod, and the gap can enableboth the first valve core unit 41 and the second valve core unit 42 tokeep joint sealing with the valve seat 30. Note that, the connecting rod60 is made of panel veneer and formed by blanking.

As shown in FIG. 7 and FIG. 8, in the present embodiment, the secondvalve core unit 42 has a valve core body 421 and a connecting unit 422,and the radial dimension of the connecting unit 422 is less than that ofthe valve core body 421. The connecting unit 422 is used for matchingthe second installing hole 62; and the size makes it easy to realizecompression.

As shown in FIG. 15 and FIG. 16, in the present embodiment, a pressurespring 70 is set between the connecting rod 60 and the second valve coreunit 42. Because the pressure difference between the two sides of thesecond valve core unit 42 is very small, for ensuring its sealingperformance, a disc-shaped leaf spring is added between the second valvecore unit 42 and the connecting rod 60, so that the second valve coreunit 42 can cling to the valve seat 30 to keep tight. Preferably, thespring is made of panel veneer and formed by blanking; for preventing asharp edge from damaging the second valve core unit 42 and enabling thesecond valve core unit 42 and the connecting rod 60 to contact and fitbetter, the upper and under the spring are provided with edge folds.

In the embodiment 2, a surface, facing the valve seat 30, of the secondvalve core unit 42 has a recess. The above structure reduces a contactarea between the second valve core unit 42 and the valve seat 30, sothat the moving frictional resistance of the second valve core unit 42is reduced.

As shown in FIG. 6, in the present embodiment, the reversing valvefurther comprises: a plurality of flow path ports correspondingly arecommunicated with the plurality of valve ports; the plurality of flowpath ports comprise the C port 51 is communicated with the third valveport 31, the S port 52 is communicated with the first valve port 32, theE port 53 is communicated with the second valve port 33, the D2 port 54is communicated with the fifth valve port 34 and the D1 port 55 iscommunicated with the fourth valve port 35. Each of above ports ismatched with its corresponding valve ports, so as to enable theconnecting pipes are matched with the reversing valve to be connected tothe ports, thus facilitating the connecting pipes.

Preferably, the valve chamber, the valve seat 30 and the flow path portsare first assembled with other needed parts, and then welded as a bodyby adopting a welding technology (flaming welding or brazing through atunnel kiln).

The application also provides a refrigerating system; as shown in FIG.6, the embodiment of the refrigerating system according to theapplication comprises a compressor 1, a first heat exchanger 3, a secondheat exchanger 4, a throttle valve 2 is commuicated with the first heatexchanger 3 with the second heat exchanger 4, and a reversing valve. Thereversing valve is that mentioned above; an inlet end of the compressor1 is communicated with the first valve port 32 of the reversing valve;an outlet end of the compressor 1 is communicated with the fourth valveport 35 and the fifth valve port 34 of the reversing valve respectively;the first heat exchanger 3 is communicated with the third valve port 31of the reversing valve; the second heat exchanger 4 is communicated withthe second valve port 33 of the reversing valve.

The specific working process of the refrigerating system is elaboratedblow by taking that the first heat exchanger 3 is an outdoor heatexchanger, and the second heat exchanger 4 is an indoor heat exchangerfor example:

When the refrigerating system runs, as shown in FIG. 6, the reversingvalve is at the second preset position, the E port 53 and the S port 52are communicated, the D2 port 54 and the C port 51 are communicated, andthe D1 port 55 is shielded by the second valve core unit 42 to close.The refrigerant in the system flows according to a full line path in thefigure. Specifically, the gas output from the compressor 1 enters thevalve chamber from the D2 port 54, then is output from the C port 51communicated with the D2 port 54, and goes through the first heatexchanger 3, the throttle valve 2 and the second heat exchanger 4 insequence; the refrigerant output from the second heat exchanger 4 entersthe E port 53, then is output from the S port 52 communicated with the Eport 53, and finally returns to the compressor 1. The above workingprocess is a working cycle of the refrigerating system.

As shown in FIG. 6, in the present embodiment, the refrigerating systemfurther comprises an auxiliary heat exchanger 6, and the auxiliary heatexchanger 6 can be set between the outlet end of the compressor 1 andthe fifth valve port 34. The above structure makes the high-temperatureand the high-pressure gas output from the compressor 1 first go throughthe auxiliary heat exchanger 6 to perform heat exchange; the refrigerantoutput from the auxiliary heat exchanger 6 enters the valve chamber fromthe D2 port 54, then is output from the C port 51 communicated with theD2 port 54, and go through the first heat exchanger 3, the throttlevalve 2 and the second heat exchanger 4 in sequence; the refrigerantoutput from the second heat exchanger 4 enters the E port 53, then isoutput from the S port 52 communicated with the E port 53, and finallyreturns to the compressor 1. The high-temperature and the high-pressuregas output from the compressor 1 goes through the auxiliary heatexchanger 6 and releases heat. The heat released from the gas can beused for heating other substances, which can further save energy andreduce emission, thus achieving the effect of saving energy and reducingemission.

When the air conditioner needs to heat in running, an electromagneticsystem functions to make the connecting rod 60 drive the first valvecore unit 41 and the second valve core unit 42 to move to the firstpreset position (not shown in the figure), at this point, the C port 51is communicated with the S port 52, the D1 port 55 is communicated withthe E port 53, and the D2 port 54 is shielded by the second valve coreunit 42 to close; the refrigerant in the system flows according to adotted line path. Specifically, the gas output from the compressor 1directly enters the D1 port 55 without going through the auxiliary heatexchanger 6, that is, the auxiliary heat exchanger 6 does not exchangerheat, but only functions in storing a part of refrigerant, at thispoint, this part of refrigerant does not participate in the cyclingworking. The refrigerant entering the valve chamber from the D1 port 55is output from the E port 53, and goes through the second heat exchanger4, the throttle valve 2, and the first heat exchanger 3 in sequence; therefrigerant output from the first heat exchanger 3 enters the C port 51,then is output from the S port 52 communicated with the C port 51, andfinally returns to the compressor 1. The above working process is aworking cycle of a heating system. Note that, the electromagnetic systemmainly functions in moving the valve core part in the valve chamber, soas to achieve the intention of reversing the valve chamber, namely beingthe same as a four-way valve in the prior art.

Certainly, when the first heat exchanger 3 is the indoor heat exchanger,the second heat exchanger 4 is the outdoor heat exchanger, the auxiliaryheat exchanger 6 is set between the outlet end of the compressor 1 andthe fourth valve port 35; at this point, the working principle is thesame as that when the first heat exchanger 3 is the outdoor heatexchanger, the second heat exchanger 4 is the indoor heat exchanger,which will not be repeated.

The skilled in the art should know that when the first heat exchanger 3is the indoor heat exchanger, the second heat exchanger 4 is the outdoorheat exchanger, the cooling mode and the heating mode are just contraryto the above description. Moreover, as a feasible embodiment, theauxiliary heat exchanger 6 can also be communicated with the fourthvalve port 35.

The above is only the preferred embodiment of the present invention andnot intended to limit the present invention; for those skilled in theart, the present invention may have various modifications and changes.Any modifications, equivalent replacements, improvements and the likewithin the spirit and principle of the present invention shall fallwithin the scope of protection of the present invention.

1. A reversing valve, comprising a pilot valve and a main valve; themain valve comprises: a valve body with a valve chamber, wherein thevalve chamber is provided with a valve seat therein, and the valve seatis provided with a plurality of valve ports thereon; a plurality of flowpath ports are correspondingly communicated with the plurality of valveports; a sliding valve core is matched with the valve seat; and a drivecomponent driving the sliding valve core to selectively open or closethe valve ports, wherein, the plurality of valve ports comprise a firstvalve port, a second valve port, a third valve port, a fourth valveport, and a fifth valve port; the plurality of flow path ports comprisean S port which is communicated with the first valve port, an E port iscommunicated with the second valve port, a C port is communicated withthe third valve port, a D1 port is communicated with the fourth valveport and a D2 port is communicated with the fifth valve port; when thesliding valve core slides to a first preset position, the D1 port iscommunicated with the E port, and the S port is communicated with the Cport; when the sliding valve core slides to a second preset position,the D2 port is communicated with the C port, and the S port iscommunicated with the E port.
 2. The reversing valve as claimed in claim1, wherein when the sliding valve core is at the first preset position,the D2 port is hermetically communicated with the valve chamber; whenthe sliding valve core is at the second preset position, the D1 port ishermetically communicated with the valve chamber.
 3. The reversing valveas claimed in claim 1, wherein the sliding valve core is separatelyprovided with a first channel and a second channel thereon; when thesliding valve core is at the first preset position, the D1 port and theE port are communicated through the first channel, and the S port andthe C port are communicated through the second channel; when the valvecore is at the second preset position, the D2 port and the C port arecommunicated through the second channel, and the S port and the E portare communicated through the first channel.
 4. The reversing valve asclaimed in claim 1, wherein the reversing valve further comprising aspring pressing flake pressing the sliding valve core against the valveseat; the spring pressing flake is provided with first elastic pressingunits which are symmetrically arranged at two sides of the lengthdirection of the spring pressing flake; the sliding valve core is anintegrated structure, and there are first pressing slots are matchedwith the first elastic pressing units at two sides of the lengthdirection of the sliding valve core.
 5. The reversing valve as claimedin claim 4, wherein the spring pressing flake is further provided with asecond elastic pressing unit which is arranged along the width directionof the spring pressing flake; there is also a second pressing slot ismatched with the second elastic pressing unit at the width direction ofthe approximately central part of the sliding valve core.
 6. Thereversing valve as claimed in claim 3, wherein the reversing valvefurther comprising the spring pressing flake pressing the sliding valvecore against the valve seat, wherein the sliding valve core comprises afirst valve core provided with the first channel and a second valve coreprovided with the second channel; the spring pressing flake comprises afirst spring pressing flake is matched with the first valve core and asecond spring pressing flake is matched with the second valve core. 7.The reversing valve as claimed in claim 3, wherein the valve chamber isisolated from the first channel and the second channel hermetically. 8.The reversing valve as claimed in claim 1, wherein the sliding valvecore comprises a first valve core unit and a second valve core unitwhich are set at interval and move synchronously; the first valve coreunit is matched with the first valve port, the second valve port and thethird valve port; the second valve core unit is matched with the fourthvalve port and the fifth valve port; when the sliding valve core is atthe first preset position, the first valve port and the third valve portare communicated through an internal channel of the first valve coreunit, the second valve port and the fourth valve port are communicatedthrough the valve chamber, and the second valve core unit blocks thefifth valve port; when the sliding valve core is at the second presetposition, the first valve port and the second valve port arecommunicated through the internal channel in the first valve core unit,the third valve port and the fifth valve port are communicated throughthe valve chamber, and the second valve core unit blocks the fourthvalve port.
 9. The reversing valve as claimed in claim 8, wherein thedrive component comprises a connecting rod; the first valve core unitand the second valve core unit are installed on the connecting rod; theconnecting rod is provided with a first installing hole for installingthe first valve core unit and a second installing hole for installingthe second valve core unit.
 10. The reversing valve as claimed in claim9, wherein the second valve core unit has a valve core body and aconnecting unit; the radial dimension of the connecting unit is lessthan the radial dimension of the valve core body.
 11. The reversingvalve as claimed in claim 9, wherein a pressure spring is set betweenthe connecting rod and the second valve core unit.
 12. The reversingvalve as claimed in claim 8, wherein a surface, facing the valve seat,of the second valve core unit has a recess.
 13. The reversing valve asclaimed in claim 1, wherein the valve chamber is cylinder-shaped; thefirst valve port, the second valve port, the third valve port, thefourth valve port and the fifth valve port are set at one side of thevalve chamber, and are linearly distributed in the axis direction of thevalve chamber.
 14. A refrigerating system, comprising: a compressor, afirst heat exchanger, a second heat exchanger and a throttle valve, thethrottle valve makes the first heat exchanger communicating with thesecond heat exchanger; wherein the refrigerating system furthercomprises an auxiliary heat exchanger and a reversing valve as claimedin claim 1; an inlet end of the compressor is communicated with a firstvalve port of the reversing valve; an outlet end of the compressor iscommunicated with a fourth valve port and a fifth valve port of thereversing valve respectively; the first heat exchanger is communicatedwith a third valve port of the reversing valve; the second heatexchanger is communicated with a second valve port of the reversingvalve; the auxiliary heat exchanger is set between the outlet end of thecompressor and the fourth valve port or between the outlet end of thecompressor and the fifth valve port.
 15. The reversing valve as claimedin claim 2, wherein the reversing valve further comprising a springpressing flake pressing the sliding valve core against the valve seat;the spring pressing flake is provided with first elastic pressing unitswhich are symmetrically arranged at two sides of the length direction ofthe spring pressing flake; the sliding valve core is an integratedstructure, and there are first pressing slots are matched with the firstelastic pressing units at two sides of the length direction of thesliding valve core.
 16. The reversing valve as claimed in claim 3,wherein the reversing valve further comprising a spring pressing flakepressing the sliding valve core against the valve seat; the springpressing flake is provided with first elastic pressing units which aresymmetrically arranged at two sides of the length direction of thespring pressing flake; the sliding valve core is an integratedstructure, and there are first pressing slots are matched with the firstelastic pressing units at two sides of the length direction of thesliding valve core.
 17. The reversing valve as claimed in claim 14,wherein the spring pressing flake is further provided with a secondelastic pressing unit which is arranged along the width direction of thespring pressing flake; there is also a second pressing slot is matchedwith the second elastic pressing unit at the width direction of theapproximately central part of the sliding valve core.
 18. The reversingvalve as claimed in claim 15, wherein the spring pressing flake isfurther provided with a second elastic pressing unit which is arrangedalong the width direction of the spring pressing flake; there is also asecond pressing slot is matched with the second elastic pressing unit atthe width direction of the approximately central part of the slidingvalve core.